我有一个“坏令牌”错误，谁能告诉我为什么？(代码)

// 示例代码：检查令牌过期时间
function isTokenExpired(token) {
    const decoded = jwtDecode(token); // 假设使用JWT
    const currentTime = Date.now() / 1000;
    return decoded.exp < currentTime;
}

// 示例代码：验证JWT令牌
const jwt = require('jsonwebtoken');

function verifyToken(token, secret) {
    try {
        const decoded = jwt.verify(token, secret);
        return decoded;
    } catch (err) {
        throw new Error('Invalid token');
    }
}

// 示例代码：在HTTP请求中传递令牌
const axios = require('axios');

async function makeRequestWithToken(url, token) {
    try {
        const response = await axios.get(url, {
            headers: {
                'Authorization': `Bearer ${token}`
            }
        });
        return response.data;
    } catch (err) {
        console.error(err);
    }
}

// 示例代码：服务器端令牌验证中间件
function authenticateToken(req, res, next) {
    const authHeader = req.headers['authorization'];
    const token = authHeader && authHeader.split(' ')[1];
    if (token == null) return res.sendStatus(401);

    jwt.verify(token, process.env.ACCESS_TOKEN_SECRET, (err, user) => {
        if (err) return res.sendStatus(403);
        req.user = user;
        next();
    });
}